It's a story about when you wake up, you realize you swapped genders. The story is disjointed. (Source: Author's Pixiv, translated) Note: The booklet release contains 2 extra chapters.

One morning, when Mememori woke up, he had become a girl. She was surprised that she suddenly changed genders, but now that she is a beautiful girl, Mememori decides to live her life as one! An exciting TS comedy begins!! (Source: Square Enix, translated)